<a href=http://onlineslangdictionary.com/meaning-definition-of/ragtop>ragtop</a> To link to this term in a wiki such as Wikipedia, insert the following. [http://onlineslangdictionary.com/meaning-definition-of/ragtop ragtop] Some wikis use a different format for links, so be sure to check the documentation.
Talc (1), the softest mineral on the Mohs scale has a hardness greater than gypsum (2) in the direction that is perpendicular to the cleavage. Diamonds (10) also show a variation in hardness (the octahedral faces are harder than the cube faces).
Mohs' hardness scale. Series of ten minerals from the softest to the hardest, so arranged that the mineral with a lower number can be scratched by the mineral with the higher number: 1-talc, 2-gypsum, 3-calcit, 4-fluorite, 5-apatite, 6-orthoclase, 7-quartz, 8-topaz, 9-corundum, 10-diamond. Invented in 1812 by the German geologist Friedrich Mohs (1773-1839).